K12教育赛事综合服务平台
专注青少年竞赛题库网站
聚乐之家官方网站
下载聚乐之家官方App
ls = [23, 19, 30, 87, 42, 58, 99, 14] ls.insert(-2, 6)
[23, 19, 6, 30, 87, 42, 58, 99, 14]
[23, 19, 30, 87, 42, 58, 6, 99, 14]
[23, 19, 30, 87, 42, 58, -2, 99, 14]
[23, 19, 30, 87, 42, 58, 99, 6, 14]